xref: /linux/drivers/pci/hotplug/shpchp_sysfs.c (revision 3932b9ca55b0be314a36d3e84faff3e823c081f5)
1 /*
2  * Compaq Hot Plug Controller Driver
3  *
4  * Copyright (c) 1995,2001 Compaq Computer Corporation
5  * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
6  * Copyright (c) 2001 IBM Corp.
7  *
8  * All rights reserved.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or (at
13  * your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18  * NON INFRINGEMENT.  See the GNU General Public License for more
19  * details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24  *
25  * Send feedback to <greg@kroah.com>
26  *
27  */
28 
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/pci.h>
33 #include "shpchp.h"
34 
35 
36 /* A few routines that create sysfs entries for the hot plug controller */
37 
38 static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf)
39 {
40 	struct pci_dev *pdev;
41 	char *out = buf;
42 	int index, busnr;
43 	struct resource *res;
44 	struct pci_bus *bus;
45 
46 	pdev = container_of (dev, struct pci_dev, dev);
47 	bus = pdev->subordinate;
48 
49 	out += sprintf(buf, "Free resources: memory\n");
50 	pci_bus_for_each_resource(bus, res, index) {
51 		if (res && (res->flags & IORESOURCE_MEM) &&
52 				!(res->flags & IORESOURCE_PREFETCH)) {
53 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
54 				       (unsigned long long)res->start,
55 				       (unsigned long long)resource_size(res));
56 		}
57 	}
58 	out += sprintf(out, "Free resources: prefetchable memory\n");
59 	pci_bus_for_each_resource(bus, res, index) {
60 		if (res && (res->flags & IORESOURCE_MEM) &&
61 			       (res->flags & IORESOURCE_PREFETCH)) {
62 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
63 				       (unsigned long long)res->start,
64 				       (unsigned long long)resource_size(res));
65 		}
66 	}
67 	out += sprintf(out, "Free resources: IO\n");
68 	pci_bus_for_each_resource(bus, res, index) {
69 		if (res && (res->flags & IORESOURCE_IO)) {
70 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
71 				       (unsigned long long)res->start,
72 				       (unsigned long long)resource_size(res));
73 		}
74 	}
75 	out += sprintf(out, "Free resources: bus numbers\n");
76 	for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
77 		if (!pci_find_bus(pci_domain_nr(bus), busnr))
78 			break;
79 	}
80 	if (busnr < bus->busn_res.end)
81 		out += sprintf(out, "start = %8.8x, length = %8.8x\n",
82 				busnr, (int)(bus->busn_res.end - busnr));
83 
84 	return out - buf;
85 }
86 static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
87 
88 int shpchp_create_ctrl_files (struct controller *ctrl)
89 {
90 	return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
91 }
92 
93 void shpchp_remove_ctrl_files(struct controller *ctrl)
94 {
95 	device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
96 }
97